CN112502919A - Bearing arrangement for a wind turbine and wind turbine - Google Patents

Bearing arrangement for a wind turbine and wind turbine Download PDF

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Publication number
CN112502919A
CN112502919A CN202010975781.1A CN202010975781A CN112502919A CN 112502919 A CN112502919 A CN 112502919A CN 202010975781 A CN202010975781 A CN 202010975781A CN 112502919 A CN112502919 A CN 112502919A
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CN
China
Prior art keywords
bearing
drive shaft
bearing housing
separate
wind turbine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010975781.1A
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Chinese (zh)
Inventor
E·德米西
C·米夏尔森
M·索伦森
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Siemens Gamesa Renewable Energy AS
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Siemens Gamesa Renewable Energy AS
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Filing date
Publication date
Application filed by Siemens Gamesa Renewable Energy AS filed Critical Siemens Gamesa Renewable Energy AS
Publication of CN112502919A publication Critical patent/CN112502919A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/70—Bearing or lubricating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/40—Arrangements or methods specially adapted for transporting wind motor components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D15/00—Transmission of mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/70—Bearing or lubricating arrangements
    • F03D80/703—Shaft bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80—Arrangement of components within nacelles or towers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80—Arrangement of components within nacelles or towers
    • F03D80/88—Arrangement of components within nacelles or towers of mechanical components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
    • F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
    • F16C17/105—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one bearing surface providing angular contact, e.g. conical or spherical bearing surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/10—Stators
    • F05B2240/14—Casings, housings, nacelles, gondels or the like, protecting or supporting assemblies there within
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/50—Bearings
    • F05B2240/53—Hydrodynamic or hydrostatic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/50—Bearings
    • F05B2240/54—Radial bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/60—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/26—Systems consisting of a plurality of sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/31—Wind motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention relates to a bearing arrangement for a wind turbine, comprising a bearing housing and a drive shaft, wherein the drive shaft is arranged in the bearing housing in an axial direction along a longitudinal axis of the bearing housing, the bearing arrangement further comprising a leeward bearing and a windward bearing as radial fluid bearings, wherein the leeward bearing and the windward bearing are arranged between the bearing housing and the drive shaft, wherein the bearing housing is formed by at least two separate bearing housing parts, wherein the at least two separate bearing housing parts engage each other and/or the drive shaft is formed by at least two separate drive shaft parts, wherein the at least two separate drive shaft parts engage each other. The invention also relates to a wind turbine comprising a bearing arrangement, wherein the wind turbine further comprises a rotor operatively connected to drive said drive shaft and a generator operatively connected to be driven by the drive shaft.

Description

Bearing arrangement for a wind turbine and wind turbine
Technical Field
The invention relates to a bearing arrangement for a wind turbine and to a wind turbine.
Background
Typically, a bearing arrangement of a wind turbine comprises a bearing housing and a drive shaft, wherein the drive shaft is arranged within the bearing housing in an axial direction along a longitudinal axis of the bearing housing. The bearing of the bearing arrangement is arranged around the drive shaft such that the drive shaft is rotatable within the bearing housing by means of the rotor of the wind turbine. Such a bearing device is known, for example, from EP3276192a 1.
The rotating drive shaft in large wind turbines is long and has a large diameter with very tight tolerance requirements for the bearing raceways. Such shafts are very difficult and expensive to cast and machine. However, a single bearing housing is required to maintain the cleanliness of lubrication at an acceptable level. The diameter of such a bearing housing is very large, which is why it becomes complicated to build a wind turbine nacelle around it. The bearing housing and drive shaft are difficult to fit into the supply base and transportation solution. Thus, the size and weight of these two components makes manufacturing and assembly expensive and limited to certain procedures.
Disclosure of Invention
It is an object of the present invention to provide a bearing arrangement for a wind turbine, which bearing arrangement can be manufactured, transported, installed more easily and is cheaper.
This object is achieved by the subject matter of the claims. In particular, the object is achieved by a bearing arrangement of a wind turbine according to claim 1 and a wind turbine according to claim 10. Further details of the invention emerge from the other claims as well as from the description and the drawings. Thus, the features and details described in connection with the inventive bearing arrangement are applied in connection with the inventive wind turbine such that the disclosures with respect to the various aspects of the invention, which are or can be referred to each other, are mutually referenced.
According to a first aspect of the invention, this object is achieved by a bearing arrangement for a wind turbine, comprising a bearing housing and a drive shaft, wherein the drive shaft is arranged within the bearing housing in an axial direction along a longitudinal axis of the bearing housing, the bearing arrangement further comprising a leeward bearing and a windward bearing as radial fluid bearings, wherein the leeward bearing and the windward bearing are arranged between the bearing housing and the drive shaft, wherein the bearing housing is formed by at least two separate bearing housing parts, wherein the at least two separate bearing housing parts engage each other and/or the drive shaft is formed by at least two separate drive shaft parts, wherein the at least two separate drive shaft parts engage each other.
The invention thus provides a split bearing arrangement (split bearing arrangement) in which the bearing housing and/or the drive shaft are made in smaller pieces than in one piece. Machining, handling and assembly of these pieces is easier and cheaper than manufacturing and providing the drive shaft and/or the bearing housing in one single piece. With the present invention, an offline bearing device assembly capability is provided, which enables a wind turbine nacelle assembly to break away from any bearing-related cleaning standards, and without occupying a dedicated crane and large assembly fixtures, thereby greatly enhancing assembly flexibility.
The separate bearing housing part and/or the drive shaft part can in particular be formed integrally. The separate bearing housing part and/or the drive shaft part may comprise a cylindrical shape. For example, each individual bearing housing part may comprise a length along the longitudinal axis in the range of 20% to 70%, in particular in the range of 30% to 70%. For example, each individual drive shaft member may comprise a length along the longitudinal axis in the range of 20% to 70%, in particular in the range of 30% to 70%.
Preferably, the bearing housing is formed by at least three separate bearing housing parts, wherein the at least three separate bearing housing parts engage each other and/or the drive shaft is formed by at least three separate drive shaft parts, wherein the at least three separate drive shaft parts engage each other. For example, each individual bearing housing part may comprise a length along the longitudinal axis in the range of 10% to 50%, in particular in the range of 15% to 40%. Each individual drive shaft member may comprise a length, for example, in the range of 10% to 70%, in particular in the range of 15% to 60%, along the longitudinal axis. The intermediate drive shaft member of the drive shaft may be longer in the longitudinal direction than the downwind drive shaft member and the upwind drive shaft member.
Further preferably, the separate bearing housing part and/or the separate drive shaft part comprise a plurality of engagement surfaces extending transversely to the longitudinal axis. The engagement surface may extend transverse to the longitudinal axis at an angle in the range of 60 ° to 90 °, particularly 70 ° to 90 ° and further particularly 80 ° to 90 °. Thus, the joint of the bearing device is able to transmit very high loads without deforming.
Furthermore, it is preferred that the separate bearing housing part and/or the separate drive shaft part comprise flange portions which are engaged with each other by means of fasteners. Thereby, a very stable joint is provided. The flange portion may include an engagement surface. The fasteners may be, for example, bolts. The flange portion of the drive shaft member may extend around the entire circumferential portion of the drive shaft member at its respective location. The flange portion of the bearing housing member need not extend around the entire circumferential portion of the bearing housing member. Rather, they may extend around at least about 20%, preferably at least about 30% and more preferably at least 50% of the circumferential portion of the bearing housing pieces at their respective positions. Thus, sufficient design freedom may be provided to provide an attachment arrangement at the bearing housing for attachment to the nacelle.
Preferably, at least one of the individual bearing housing parts comprises an opening for maintenance of the leeward bearing and/or the windward bearing. The opening may have, for example, an oval shape. Thus, components of the windward and leeward bearings, such as the bearing pads, can be easily removed and replaced.
It is further preferred that at least one of the individual bearing housing parts comprises at least one lifting lug for lifting the bearing housing. In particular, at least one of the individual bearing housing parts may comprise at least two lifting eyes. Thus, the entire assembled bearing device can easily be lifted by means of a crane.
It is also preferred that a static seal is arranged between the individual drive shaft parts. The static seal may be, for example, an O-ring. Thereby preventing oil or other substances from leaking into the drive shaft.
The leeward and windward bearings may include a plurality of radial bearing pads supported on the bearing housing and arranged around a circumferential portion of the drive shaft. The radial bearing pad may be a sliding radial bearing pad. The radial bearing pads may be reversibly attached to the bearing housing. Therefore, they can be easily maintained and replaced. Typically, slowly rotating sliding bearings are employed in large wind turbines. These sliding bearings carry high winds and heavy loads. For these reasons, the dimensions of each bearing pad and associated rotating shaft and bearing housing are significantly large in both diameter and length, as compared to, for example, turbomachines employing roller bearings. Therefore, the present invention is particularly useful in such a bearing device.
The bearing means may comprise an axial bearing. The axial bearing may comprise an axial bearing stop for limiting movement of the drive shaft in an axial direction along the longitudinal axis. The axial bearing stop can be designed integrally with the bearing housing. Further, the axial bearing stopper may be formed as a protrusion extending from the bearing housing in a radial direction of the bearing housing. The axial bearing may be located at the upwind or downwind part of the drive shaft. The axial bearing stop may in particular be arranged at the downwind end of the bearing housing. A plurality of axial bearing pads may be (in particular reversibly) attached to the axial bearing stop. The axial bearing stop may also be arranged around the entire circumferential portion of the bearing housing. The leeward bearing or the windward bearing and the axial bearing may be fluidly connected to each other. The axial bearing may include an axial collar disposed opposite the axial bearing stop. The axial collar may be disposed about the entire circumferential portion of the drive shaft and/or the axial collar may extend outwardly from the drive shaft. The axial collar may be integrally formed with the drive shaft.
According to a second aspect of the invention, the object is achieved by a wind turbine comprising a bearing arrangement according to any of the preceding claims, wherein the wind turbine further comprises a rotor operatively connected to drive the drive shaft and a generator operatively connected to be driven by the drive shaft.
The generator may be, for example, a direct drive generator or a geared generator with a gearbox. The rotor is also commonly referred to as the hub of the wind turbine. Two, three or more wind turbine blades may be attached to the rotor or the hub. The wind turbine may further comprise a nacelle, which may be supported on a tower of the wind turbine. The nacelle may comprise a bearing arrangement. The bearing arrangement (in particular the bearing housing) as well as the generator may be attached to the nacelle and/or the tower.
Drawings
Further advantages, features and details of the invention emerge from the following description, in which embodiments of the invention are described in detail with reference to fig. 1 to 5 of the drawings. The features recited in the claims and those mentioned in the description are therefore essential to the invention either individually or in any combination. In the drawings, there is shown schematically:
figure 1 is a side view of a wind turbine,
figure 2 is a side perspective view of a section along the longitudinal axis of the bearing arrangement of the wind turbine of figure 1,
figure 3 is a side view in cross section of the bearing arrangement of the wind turbine of figure 1,
figure 4 shows a side perspective view of the bearing housing of the bearing arrangement of figure 3,
fig. 5 shows a side perspective view of the drive shaft of the bearing arrangement of fig. 3.
Like objects in fig. 1-5 are designated with like reference numerals. If there is more than one object of the same type in a graph, the objects are numbered in ascending order, with the ascending numbers of the objects being spaced apart from their reference numbers by dots. The specific dimensions of features and components in the figures are exemplary and may be exaggerated for ease of reference only.
Detailed Description
FIG. 1 shows a side view of a wind turbine 10. The wind turbine 10 includes a support tower 20 and a nacelle 30, wherein the nacelle 30 is attached to the support tower 20. The nacelle 30 comprises a bearing arrangement 70, which is not shown in fig. 1 but is visible in fig. 2. Wind turbine 10 also includes a generator 40 attached to a rotor 50 of wind turbine 10. Two wind turbine blades 60.1, 60.2 are attached to the rotor 50.
Fig. 2 shows a side perspective view of a section along the longitudinal axis a of the bearing arrangement 70 of the wind turbine 10 of fig. 1. The bearing arrangement 70 comprises a bearing housing 80 and a drive shaft 90, wherein the drive shaft 90 is arranged within the bearing housing 80 in an axial direction of a longitudinal axis a of the bearing housing 80 as shown in fig. 2. The longitudinal axis a of the bearing housing 80 corresponds to the longitudinal axis a of the drive shaft 90 and is thus the longitudinal axis a of the bearing arrangement 70. The bearing arrangement 90 further comprises a downwind bearing 100 and an upwind bearing 200 as radial fluid bearings, wherein the downwind bearing 100 and the upwind bearing 200 are arranged between the bearing housing 80 and the drive shaft 90. In particular, the leeward bearing 100 is disposed around the leeward portion of the drive shaft 90, and the upwind bearing 200 is disposed around the upwind portion of the drive shaft 90. Furthermore, there is an axial bearing 300 arranged adjacent to the leeward bearing 100. The drive shaft 90 is operatively connected to the generator 40. The generator 40 is shown as a direct drive generator. However, the generator 40 may also be provided as a geared generator, for example.
FIG. 3 is a side view in cross-section of the bearing arrangement 70 of the wind turbine 10 of FIG. 1.
As can be seen from fig. 3, the bearing housing 80 is formed by three separate bearing housing parts 81, 82, 83. The first bearing housing part 81 is disposed at the upwind portion of the bearing housing 80. The second bearing housing member 82 is disposed at an intermediate portion of the bearing housing 80. The third bearing housing member 83 is disposed at a downwind portion of the bearing housing 80. The bearing housing parts 81, 82, 83 have a generally cylindrical shape. The bearing housing parts 81, 82, 83 have engagement surfaces extending transversely, in particular perpendicularly, to the longitudinal axis a of the bearing housing 80.
The first bearing housing piece 81 includes a first flange portion 84 that is joined to a second flange portion 85 of the second bearing housing piece 82 by a plurality of fasteners. Further, the second bearing housing piece 82 includes a third flange portion 86 that is connected to a fourth flange portion 87 of the third bearing housing piece 83 by means of a plurality of fasteners. The flange portions 84, 85, 86, 87 extend in the radial direction from the bearing housing pieces 81, 82, 83. The flange portions 84, 85, 86, 87 include engagement surfaces where they are engaged with each other, respectively.
As can also be seen in fig. 3, the drive shaft 90 is formed by three separate drive shaft pieces 91, 92, 93. The first driving shaft member 91 is provided at the upwind portion of the driving shaft 90. A second drive shaft member 92 is provided at an intermediate portion of the drive shaft 90. The drive shaft member 93 is disposed at a leeward portion of the drive shaft 90. The drive shaft members 91, 92, 93 have a generally cylindrical shape. The drive shaft elements 91, 92, 93 have engagement surfaces extending transversely, in particular perpendicularly, to the longitudinal axis a of the drive shaft 90.
The first drive shaft member 91 includes a fifth flange portion 94 that is joined to a sixth flange portion 95 of the second drive shaft member 92 by a plurality of fasteners. Further, the second drive shaft member 92 includes a seventh flange portion 96 that is connected to an eighth flange portion 97 of the third drive shaft member 93 by a plurality of fasteners. The flange portions 94, 95, 96, 97 extend in the radial direction from the bearing housing parts 91, 92, 93. The flange portions 94, 95, 96, 97 include engagement surfaces where they are engaged with each other, respectively.
The first driving shaft member 91 is shorter in length along the longitudinal axis a than the first bearing housing member 81, and the second driving shaft member 92 is longer in length along the longitudinal axis a than the second bearing housing member 82. The third driving shaft member 93 has a shorter length along the longitudinal axis a than the third bearing housing member 83. Further, the length of the first bearing housing part 81 along the longitudinal axis a is longer than the first driving shaft part 91, and further, the length of the third bearing housing part 83 along the longitudinal axis a is longer than the third driving shaft part 93. Generally, it may be preferred that the first and third bearing housing pieces 81 and 83 are longer than the first and third driving shaft members 91 and 93, respectively. Thus, although the bearing housing 80 and the drive shaft 90 are not made from one single piece, possible misalignment due to load transfer can be kept very low.
Fig. 4 shows a side perspective view of the bearing housing 80 of the bearing arrangement 70 of fig. 3. The bearing housing 80 comprises a plurality of openings 88.1, 88.2, 88.3, 88.4 for maintenance of the leeward bearing 100 and the windward bearing 200. A first opening 88.1 and a second opening 88.2 are formed in the first bearing housing part 81. A third opening 88.3 and a fourth opening 88.4 are formed in the third bearing housing part 83. Furthermore, the bearing housing 80, in particular the second bearing housing part 82, comprises two lifting lugs 89.1, 89.2. By means of the lifting lugs 89.1, 89.2, the bearing housing 80, the entire bearing arrangement 70 or even the bearing arrangement 70 together with the nacelle 30 (when the bearing arrangement 70 is fixed thereto) can be lifted, for example by means of a crane.
Fig. 5 shows a side perspective view of the drive shaft 90 of the bearing arrangement 70 of fig. 3. Due to the flange portions 94, 95, 96, 97, the drive shaft 90 has a non-uniform circumferential portion along its length. However, the flange portion 96 extends radially outwardly from the drive shaft 90 along a ramp. As can be seen from the fifth flange portion 94, the flange portion need not extend radially outward from the drive shaft 90, but may also be so disposed within the drive shaft 90. Therefore, the thickness of the drive shaft 90 can be set relatively large. In particular, at least one of the flange portions 94, 95, 96, 97 of the drive shaft 90, in particular the flange portion 94 of the upwind drive shaft member 91, may be provided along the thickness of the drive shaft 90. Thus, the load distribution of the drive shaft 90 is optimized.

Claims (10)

1. Bearing device (70) for a wind turbine (10), comprising a bearing housing (80) and a drive shaft (90), wherein the drive shaft (90) is arranged within the bearing housing (80) in an axial direction along a longitudinal axis (A) of the bearing housing (80), the bearing device (70) further comprising a leeward bearing (100) and a windward bearing (200) as radial fluid bearings, wherein the leeward bearing (100) and the windward bearing (200) are arranged between the bearing housing (80) and the drive shaft (90),
it is characterized in that the preparation method is characterized in that,
the bearing housing (80) is formed by at least two separate bearing housing parts (81, 82, 83), wherein the at least two separate bearing housing parts (81, 82, 83) are joined to each other and/or the drive shaft (90) is formed by at least two separate drive shaft parts (91, 92, 93), wherein the at least two separate drive shaft parts (91, 92, 93) are joined to each other.
2. Bearing arrangement (70) according to claim 1, characterized in that the bearing housing (80) is formed by at least three separate bearing housing parts (81, 82, 83), wherein the at least three separate bearing housing parts (81, 82, 83) engage each other and/or the drive shaft (90) is formed by at least three separate drive shaft parts (91, 92, 93), wherein the at least three separate drive shaft parts (91, 92, 93) engage each other.
3. Bearing arrangement (70) according to claim 1 or 2, characterized in that the separate bearing housing part (81, 82, 83) and/or the separate drive shaft part (91, 92, 93) comprises an engagement surface extending transversely to the longitudinal axis (a).
4. Bearing arrangement (70) according to any of the preceding claims, characterized in that the separate bearing housing parts (81, 82, 83) and/or the separate drive shaft part (91, 92, 93) comprise flange portions (84, 85, 86, 87, 94, 95, 96, 97) which are engaged with each other by means of fasteners.
5. Bearing arrangement (70) according to any of the preceding claims, characterized in that at least one of the individual bearing housing parts (81, 82, 83) comprises an opening (88) for maintenance of the downwind bearing (100) and/or the upwind bearing (200).
6. Bearing arrangement (70) according to any of the preceding claims, characterized in that at least one of the individual bearing housing parts (81, 82, 83) comprises a lifting lug (89) for lifting the bearing housing (80).
7. Bearing device (70) according to any of the preceding claims, wherein a static seal is arranged between the separate drive shaft pieces (91, 92, 93).
8. Bearing device (70) according to any of the preceding claims, wherein the leeward bearing (100) and the windward bearing (200) comprise a plurality of radial bearing pads supported on the bearing housing (80) and arranged around a circumferential portion of the drive shaft (90).
9. Bearing device (70) according to any of the preceding claims, wherein the bearing device (70) comprises an axial bearing (300).
10. A wind turbine (10) comprising a bearing arrangement (70) according to any of the preceding claims, wherein the wind turbine (10) further comprises a rotor (50) operatively connected to drive the drive shaft (90) and a generator (40) operatively connected to be driven by the drive shaft (90).
CN202010975781.1A 2019-09-16 2020-09-16 Bearing arrangement for a wind turbine and wind turbine Pending CN112502919A (en)

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EP19197448.4A EP3792489A1 (en) 2019-09-16 2019-09-16 Bearing arrangement for a wind turbine and wind turbine

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